检索结果-内蒙古大学图书馆

SSRN 2024年

作者： Shafique, Shareen Wang, Haodong Yuheng, Wang Qadir, Akeel Iqbal, Taimoor Yang, Cheng Zhao, Feiyu Zhao, Zhenfu Salman, Muhammad Zheng, Fei Wang, Xu Hu, Ziyang Department of Microelectronic Science and Engineering Laboratory of Clean Energy Storage and Conversion School of Physical Science and Technology Ningbo University Ningbo315211 China Faculty of Electrical Engineering and Computer Science Ningbo University Ningbo315211 China School of Information Engineering Xi’an Eurasia University 710065 China Department of Mathematics University of Engineering and Technology Main Campus G. T. Road Lahore Pakistan Optoelectronic Research Center School of Science Minzu University of China Beijing100081 China

In the era of artificial intelligence, efficient optical data transfer and weak light detection are critical for applications such as optical communication, surveillance, and environmental monitoring. Perovskite photodetectors (PDs), with their rapid response times and high sensitivity, represent a promising technology in these fields. In this study, a self-powered perovskite-based PD incorporating Ti3C2Tx MXene was developed. The MXene additive, with its high electrical conductivity and mobility, facilitated rapid charge transport and improved film morphology by reducing surface roughness and forming uniform perovskite grains. The optimized PD exhibited a dark current density of 1.46 × 10−10 A/cm2, a detectivity of 6.59 × 1012 Jones, a linear dynamic range over 181 dB, and ultra-fast response times (rise: 1.07 µs, fall: 0.74 µs). Additionally, the device demonstrated excellent operational stability under self-powered conditions, with negligible degradation in light and dark current responses. Its practical potential was validated by successful integration into an optical communication system for ASCII-encoded signal reception and the design of a weak light detection setup. These findings provide a robust foundation for advancing high-speed perovskite photodetectors, unlocking new opportunities in optoelectronic applications. © 2024, The Authors. All rights reserved.

关键词： Perovskite

来源：评论

学校读者我要写书评

暂无评论

Mg-Ba Hexa-Spinel Composited Ferrites with Enhanced Magneto-Dielectric Properties for Miniaturized High-Frequency Antennas

SSRN

引用

SSRN 2024年

作者： Gan, Gongwen Yin, Yaqin Cheng, Yue Luo, Jie Zheng, Zongliang Zhang, Xi Xie, Fei Dian, Liwen Zou, Gaojie Qiu, Feifei Zhu, Zhongyin Gou, Guoqing School of Information Science and Technology Southwest Jiaotong University Chengdu610031 China Microelectronic Research Center Department of Electrical and Computer Engineering University of Texas at Austin AustinTX78758 United States Key Laboratory of Advanced Materials Technology Ministry of Education Southwest Jiaotong University Chengdu610031 China College of Optoelectronic Engineering Xi’an Technological University Xi’an710021 China

We deeply dived multi-phase-based Ba0.16Mg0.84Fe2O4 ferrite for VHF antennas. The structural and magneto-dielectric properties synthesized at various temperatures (1100°C, 1125°C, 1150°C and 1175°C) were investigated. The results demonstrated the coexistence of hexagonal and cubic spinel phases. Microstructure analysis indicated higher temperature induced lager grain size and denser structure. Meanwhile, both the saturation magnetization (from 28 to 25 emu/g) and coercivity (19 to 5 Oe) decreased. In addition, real permeability (μ′) and permittivity (Ε′) arose at higher temperature, promising equivalent permeability and permittivity. What’s more, relatively low magnetic and dielectric losses (tanδμ ~10−2 and tanδΕ ~10-2 to 10−3) promote low energy loss. Finally, a low-profile miniaturized antenna with relative bandwidth of 14.6%, peak gain of 0.98 dB, and radiation efficiency of 74.6% was simulated based on the processed ferrites. In conclusion, the presented investigation greatly improves the magneto-dielectric response, which paves the way to realize high performance in VHF antenna application. © 2024, The Authors. All rights reserved.

关键词： Permittivity

来源：评论

学校读者我要写书评

暂无评论

Novel Quality Measure and Efficient Resolution of Convex Hull Pricing for Unit Commitment

TechRxiv

引用

TechRxiv 2022年

作者： Bragin, Mikhail A. Yan, Bing Luh, Peter B. Zheng, Tongxin Schiro, Dane A. Zhao, Feng Zhao, Jinye The Department of Electrical and Computer Engineering University of Connecticut StorrsCT06269 United States The Department of Electrical and Microelectronic Engineering Rochester Institute of Technology RochesterNY14623 United States The Advanced Technology and Solutions ISO New England HolyokeMA01040 United States

Electricity prices determined from economic dispatch without considering fixed costs may cause high uplift payments. With fixed costs, however, prices are not monotonic with respect to demand, affecting market transparency. To overcome this issue, convex hull (CH) pricing has recently been introduced for unit commitment with fixed costs. Several CH pricing methods were presented, and a feasible cost was used to quantify the CH-price quality. The associated difficulties are 1. high computational effort required to obtain a feasible cost and 2. the associated duality gap may not be tight enough to provide an accurate quality measure. In this paper, a novel measure to quantify the CH-price quality is presented by establishing an upper bound to the optimal dual value. Near-optimal CH prices are efficiently obtained by using Surrogate Lagrangian Relaxation (SLR), meanwhile, the upper bound decreases fast due to convergence of SLR. Testing results on the IEEE 118-bus system indicate that the novel quality measure is much more accurate than the measure provided by a feasible cost – demonstrating the high quality of the upper bound and the efficiency of SLR. © 2022, CC BY.

关键词： Costs

来源：评论

学校读者我要写书评

暂无评论

A quadrature frequency synthesizer with 118.7-fs jitter, 27.94% locking range for multiband 5G MMW applications 52

A quadrature frequency synthesizer with 118.7-fs jitter, 27....

引用

52nd IEEE International Symposium on Circuits and Systems, ISCAS 2020

作者： Zhang, Runxi Yang, Hui Zhang, Zitong Shi, Chunqi Fan, Qingjun Chen, Jinghong Institute of Microelectronic Circuits and Systems East China Normal University Shanghai China Department of Electrical and Computer Engineering University of Houston Houston United States

ISBN: (纸本)9781728133201

This paper presents a quadrature frequency synthesizer (QFS) utilizing a switched-coupled slotted inductor (SCSI)-based voltage-controlled oscillator (VCO) to simultaneously improve the reference spurs and out-of-band phase noise while achieving a wide frequency tuning range for multiband 5G mm-Wave (mmW) applications. The QFS is implemented in a 55 nm CMOS process, achieving a reference spurs of -64 to -72 dBc, an in-band phase noise of -81.7 to -87 dBc/Hz at 100 kHz offset and an out-of-band phase noise of -119.1 to -125.4 dBc/Hz at 10 MHz offset, respectively, over the entire 19.89 to 26.35 GHz frequency locking range. The RMS jitter for a 19.89 GHz carrier is 118.7 fs, corresponding to a jitter FOM of -238.47 dB. The chip occupies a die area of 1.31×2.13 mm2 including the testing pads and dissipates 101 mW of power. © 2020 IEEE

关键词： Phase locked loops

来源：评论

学校读者我要写书评

暂无评论

LORA (Long Range) and LORAWAN technology for IoT applications in Covid-19 pandemic

LORA (Long Range) and LORAWAN technology for IoT application...

引用

2020 International Conference on Advances in Computing, Communication and Materials, ICACCM 2020

作者： Rawat, Arvind Singh Rajendran, Jagadheswaran Ramiah, Harikrishnan Rana, Arti Collaborative Microelectronic Design Excellence Center Universiti Sains Malaysia Penang Malaysia Department of Electrical Engineering University of Malaya Kuala Lumpur Malaysia Department of Computer Science and Engineering Uttaranchal University Dehradun India

ISBN: (纸本)9781728197852

LoRa (Short for Long Range) is the fastest growing technology attracting researcher's interest now a days. Long battery life, long distance communication and low cost application specific devices are main focus of the engineers, LoRa is quite suitable for these requirements. IoT system includes four explicit sections for example sensors/devices, connectivity, processing of information and a user interface. The scope of communication has become the basic part on the majority of the IoT system, particularly in Wi-Fi and Bluetooth based IoT system. With the rise of LoRa technology, further enhancements to uses of the Internet of Things (IoT) can be figured it out. By utilizing a single receiver in the LoRa network, it can deal with numerous hubs at various areas inside the region, dissimilar to Wi-Fi-based framework which needs to have many access point to cover large area. Both LoRa and WiFi innovation has reduced total cost of IoT framework. For the wide range coverage of IoT system, LoRa is quite useful as compared to Wi-Fi and Bluetooth for short range. However, there are a few inconveniences on the speed of transmission and constraint on the size of the payload. The world when struggling with the COVID-19 pandemic, LoRa devices and the LoRaWAN protocol are playing an instrumental role in enabling public safety solutions to assist with contact tracing, ensuring healthcare regulation compliance in the workplace and addressing the needs of medical professionals. This paper presents a specialized work on LoRa/LoRaWAN innovation for IoT applications. © IEEE 2020. This article is free to access and download, along with rights for full text and data mining, re-use and analysis

关键词： Internet of things

来源：评论

学校读者我要写书评

暂无评论

Power silicon carbide schottky diodes as current mode ?-radiation detectors 32

Power silicon carbide schottky diodes as current mode ?-radi...

引用

32nd IEEE International Conference on microelectronics, MIEL 2021

作者： Ilic, S.D. Andjelkovic, M.S. Carvajal, M.A. Lallena, A.M. Krstic, M. Stankovic, S. Ristic, G.S. University of Belgrade Center of Microelectronic Technologies Technology and Metallurgy Serbia IHP-Leibniz-Institut für Innovative Mikroelektronik System Architectures Department Frankfurt Germany University of Granada Department of Electronics and Computer Technology Granada Spain Vincca Institute of Nuclear Sciences Department of Radiation and Environmental Belgrade Serbia University of Niš Faculty of Electronic Engineering Department of Microelectronics Niš Serbia

ISBN: (纸本)9781665445283

In this paper, the feasibility of using commercial power Silicon Carbide (SiC) Schottky diodes as a current mode ?-radiation detector have been examined. Diodes with almost identical electric characteristics are purchased from two different manufacturers, On Semiconductor and RoHM. They have been tested under gamma radiation exposure from a Co-60 source. The current response during irradiation has been measured for various dose rates with reversed diode bias. Investigated range of dose rates was from 0.258 Gy/h to 26.312 Gy/h, and reverse diode bias values were 10 V, 20 V, 50 V, 100 V and 200 V. Tested Schottky diodes produce stable current response for the investigated dose rates. Although the manufacturers are different, the results show that the dosimetric characteristics of these diodes have an excellent match. Sensitivity was proportional to the applied reverse bias voltage. A simple power-law can very well describe the dependence of measured radiation-induced current on dose rate. © 2021 IEEE.

关键词： Silicon carbide

来源：评论

学校读者我要写书评

暂无评论

A 64-84 GHz CMOS LNA with Excellent Gain Flatness for Wideband mmW Applications

A 64-84 GHz CMOS LNA with Excellent Gain Flatness for Wideba...

引用

IEEE International Symposium on Circuits and Systems

作者： Xin Zhang Chunqi Shi Runxi Zhang Hao Deng Jinghong Chen Institute of Microelectronic Circuits and Systems East China Normal University Shanghai China Department of Electrical and Computer Engineering University of Houston Houston USA

This paper presents a wideband millimeter wave (mmW) LNA fabricated in a 55-nm CMOS process. Inter-stage transformer peak splitting and gain equalization techniques are proposed to improve bandwidth and gain flatness. A transformer-based anti-phase coupling (TBAC) method is developed to enhance effective transconductance boosting, while optimizing noise figure (NF). The LNA achieves a peak gain of 11.8 dB with a gain variation of less than ±0.8 dB, a flat gain bandwidth (FGBW) of 15 GHz (66-81 GHz) and a BW-3dB of 20 GHz (64-84 GHz). The measured NFmin is 5.09 dB at 75 GHz and the input-referred 1dB compression point (IPidB) is -5.8 dBm at 78 GHz. The LNA consumes 40 mA from 1 V power supply.

关键词： Couplings Power supplies Frequency measurement Topology Gain Wideband Transconductance

来源：评论

学校读者我要写书评

暂无评论

A Low-Power 16-Channel SiPM Readout Front-end with a Shared SAR ADC in 180 nm CMOS 15

A Low-Power 16-Channel SiPM Readout Front-end with a Shared ...

引用

15th IEEE International Conference on Solid-State and Integrated Circuit Technology, ICSICT 2020

作者： Tang, Yuxuan Zhang, Runxi Chen, Jinghong University of Houston Department of Electrical and Computer Engineering HoustonTX77204 United States Institute of Microelectronic Circuits and Systems East China Normal University Shanghai200241 China

ISBN: (纸本)9781728162355

This paper reports a low-power and high-Timing resolution silicon photomultiplier (SiPM) readout front-end in a 180 nm CMOS technology. A low-input impedance current buffer employing current feedback is developed to achieve direct charge integration without the use of power-hungry charge-sensitive amplifiers (CSAs). A customized 10-bit SAR ADC is designed for energy digitization. The ADC is shared among 16 readout channels to reduce the chip area and improve power efficiency. The SAR ADC reuses the charge integration capacitor in each readout channel as the ADC sampling capacitor to further lower the power consumption. To reduce the SiPM noise-induced timing measurement error, an on-chip high-pass filter (HPF) based fast pulse generation approach is developed to sharpen the long-Tailed SiPM current pulses into fast pulses. With a 1.8 V power supply, the SAR ADC consumes 743 µW at 16 MS/s, and achieves a SNDR of 56.48 dB and a SFDR of 62.53 dB. The on-chip fast pulse generation brings a 35 ps improvement in timing resolution without increasing the number of I/O pin counts. Including the front-end current buffer, current mirrors, charge integrator and the shared ADC, each channel of the readout system consumes 3.8 mW of power with a conversion period of 1 µs. © 2020 IEEE.

关键词： Readout systems

来源：评论

学校读者我要写书评

暂无评论

A decomposition and coordination approach for large sub-hourly unit commitment

A decomposition and coordination approach for large sub-hour...

引用

2020 IEEE Power and Energy Society General Meeting, PESGM 2020

作者： Wu, Jianghua Luh, Peter B. Chen, Yonghong Yan, Bing Bragin, Mikhail A. University of Connecticut Department of Electrical and Computer Engineering StorrsCT06269 United States MISO Energy CarmelIN46032 United States Rochester Institute of Technology Department of Electrical and Microelectronic Engineering RochesterNY14623 United States

ISBN: (纸本)9781728155081

Sub-hourly Unit Commitment (UC) problems have been suggested as a way to improve power system efficiency. Such problems, however, are much more difficult than hourly UC problems. This is not just because of the increased number of period to consider, but also because of much reduced unit ramping capabilities leading to more complicated convex hulls. As a result, state-of-the-art and practice methods such as branch-and-cut suffer from poor performance. In this paper, our recent Surrogate Absolute-Value Lagrangian Relaxation (SAVLR) method, which overcame major difficulties of standard Lagrangian Relaxation, is enhanced by synergistically incorporating the concept of Ordinal Optimization (OO). By using OO, solving subproblems becomes much faster. Testing of Midcontinent ISO (MISO)'s problem with 15 minutes as the time interval over 36 hours involving about 1, 100 units and 15000 virtuals demonstrates that the new method obtains near-optimal solutions efficiently and significantly outperforms branch-and-cut. © 2020 IEEE.

关键词： Integer programming

来源：评论

学校读者我要写书评

暂无评论

The Unconstrained Ear Recognition Challenge 2023: Maximizing Performance and Minimizing Bias*

The Unconstrained Ear Recognition Challenge 2023: Maximizing...

引用

IEEE International Joint Conference on Biometrics (IJCB)

作者： Ž. Emeršić T. Ohki M. Akasaka T. Arakawa S. Maeda M. Okano Y. Sato A. George S. Marcel I. I. Ganapathi S. S. Ali S. Javed N. Werghi S. G. Işık E. Sarıtaş H. K. Ekenel V. Hudovernik J. N. Kolf F. Boutros N. Damer G. Sharma A. Kamboj A. Nigam D. K. Jain G. Cámara-Chávez P. Peer V. Štruc University of Ljubljana (UL SI) Shizuoka University (SU JP) Idiap Research Institute (IDIAP CH) Electrical Engineering and Computer Science Department Khalifa University (KU UAE) Department of Computer Engineering (ITU TR) Istanbul Technical University Microelectronic Guidance and Electro-Optical Group ASELSAN Fraunhofer Institute for Computer Graphics Research IGD (IGD DE) Technische Universität Darmstadt (TUD DE) Indian Institute of Technology Mandi (IIT IN) HCL Imaging and Robotics R&D Lab (HCL IN) School of Artificial Intelligence Dalian University of Technology (DLUT CN) Federal University of Ouro Preto (UFOP BR)

The paper provides a summary of the 2023 Unconstrained Ear Recognition Challenge (UERC), a benchmarking effort focused on ear recognition from images acquired in uncontrolled environments. The objective of the challenge was to evaluate the effectiveness of current ear recognition techniques on a challenging ear dataset while analyzing the techniques from two distinct aspects, i.e., verification performance and bias with respect to specific demographic factors, i.e., gender and ethnicity. Seven research groups participated in the challenge and submitted a seven distinct recognition approaches that ranged from descriptor-based methods and deep-learning models to ensemble techniques that relied on multiple data representations to maximize performance and minimize bias. A comprehensive investigation into the performance of the submitted models is presented, as well as an in-depth analysis of bias and associated performance differentials due to differences in gender and ethnicity. The results of the challenge suggest that a wide variety of models (e.g., transformers, convolutional neural networks, ensemble models) is capable of achieving competitive recognition results, but also that all of the models still exhibit considerable performance differentials with respect to both gender and ethnicity. To promote further development of unbiased and effective ear recognition models, the starter kit of UERC 2023 together with the baseline model, and training and test data is made available from: http://***/

关键词：

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：